META Select (or other) 3.x release

Here is a summary for tracking issues that will go into the new 3.x feature release.

What I would like to see is better translation support, better views filter support, removal of deprecated widgets, and automated tests. Feel free to comment on any other features you would like to see.

#1341526: Making "Available Options" Translatable
#1969084: #Meta Automated tests
#1818876: Other text should save as known value, if a known value is entered
#1811206: Using Select or Other breaks conditionals
#2443811: Remove available options PHP
#2448113: Only load includes when necessary
#2076497: Clarify descriptions for field configuration options

Related to #1716764: Incorporate Select or Other Taxonomy module:
#2165467: The label of the form shown twice.
#2371779: Other field value always added to Taxonomy terms